Training, Open Source computer languages
PerlPHPPythonMySQLApache / TomcatTclRubyJavaC and C++LinuxCSS 
Search for:
Home Accessibility Courses Diary The Mouth Forum Resources Site Map About Us Contact
 
For 2023 (and 2024 ...) - we are now fully retired from IT training.
We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.

Lisa and I (Graham) now live in what was our training centre in Melksham - happy to meet with former delegates here - but do check ahead before coming round. We are far from inactive - rather, enjoying the times that we are retired but still healthy enough in mind and body to be active!

I am also active in many other area and still look after a lot of web sites - you can find an index ((here))
grep for lines between words in a file

Posted by ramkriz (ramkriz), 26 August 2008
Hi all,

I have a file called as sample. I need to grep all the lines present between
the keywords "start" and "End" in the file. I started with this but it never enters the IF loop.  Any help to grep the data from the file will be helpfull.. Do let me know if there is an easier approach than this..

Code:
set file sample
set Intial start
set test 1
set Final end
set found 1
set fp [open $file ]
while {-1 != [gets $fp line]} {
if($test)
 {
 set test  [string compare $line $Initial]
 set found =1
  }
if($found)
   {
    send  "$line\r"
 
    }
}

Error:
./log
invalid command name "if(1)"
   while executing
"if($test) "
   ("while" body line 2)
   invoked from within
"while {-1 != [gets $fp line]} {

Thanks



Posted by admin (Graham Ellis), 27 August 2008
The immediate error is a syntax one - replace

if($test)  

with

if {$test}

(change round brackets ti curly braces, and add a space after the word "if".

Looks like you've been writing too much Perl!


Posted by ramkriz (ramkriz), 27 August 2008
Yes Graham. Iam used to perl. I have done the same in perl. I need to do it in TCL...looks so difficult to me.. Need your help...
set file sim18
set Initial start  
set test 1
set fp [open $file ]
while {-1 != [gets $fp line]} {
if {$test}
 {
 set test  [string compare $line $Initial]
 set found =1
  }
if {$found}
{
    send  "$line\r"
    }
}

It throws out the following error
./tyhoonlog
wrong # args: no script following "{$test}" argument
   while compiling
"if {$test} "



This page is a thread posted to the opentalk forum at www.opentalk.org.uk and archived here for reference. To jump to the archive index please follow this link.

You can Add a comment or ranking to this page

© WELL HOUSE CONSULTANTS LTD., 2024: Well House Manor • 48 Spa Road • Melksham, Wiltshire • United Kingdom • SN12 7NY
PH: 01144 1225 708225 • FAX: 01144 1225 793803 • EMAIL: info@wellho.net • WEB: http://www.wellho.net • SKYPE: wellho